CODEWITHSUNDEEP
docker
user1365697
user1365697

Reputation: 5989

How to override cmd in docker?

I have dockerfile

CMD [ "/run/myfile.sh" ]

I build it

docker build . -t myRepo/test/my-app:1.0.0

and run it

docker run -it --rm myRepo/test/my-app:1.0.0 sh

If I want to change the CMD with more parameters How I can do it ? for example I want to create folder 

   command: ["/bin/sh"]
    args: [ "-c", "mkdir -p /myfolder/sub && mkdir -p /myfolder2/sub2"]

I tried

docker run -it --rm myRepo/test/my-app:1.0.0 sh [ "-c", "mkdir -p /myfolder/sub && mkdir -p /myfolder2/sub2"]

Upvotes: 0

Views: 586

Answers (1)

sahaquiel
sahaquiel

Reputation: 1838

If you need to run multiple commands, try to use entrypoint.sh

Just create a shell script, for example:

#!/bin/sh
mkdir -p /foo/bar
mkdir -p /foo2/bar2
#whatever

And edit your Dockerfile:

COPY entrypoint.sh /usr/local/bin/

CMD ["entrypoint.sh"]

But I'm not sure it's your case, creating directories are better in RUN commands, not CMD:

FROM centos:7

RUN mkdir -p /foo/bar/ && mkdir -p /foo2/bar2/
RUN ...
COPY entrypoint.sh /usr/local/bin/
CMD ["entrypoint.sh"]

Upvotes: 1

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